2806091 has 4 divisors (see below), whose sum is σ = 2953800. Its totient is φ = 2658384.

The previous prime is 2806087. The next prime is 2806093. The reversal of 2806091 is 1906082.

2806091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1906082 = 2 ⋅953041.

It is a cyclic number.

It is not a de Polignac number, because 2806091 - 2² = 2806087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2806091.

It is not an unprimeable number, because it can be changed into a prime (2806093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73826 + ... + 73863.

It is an arithmetic number, because the mean of its divisors is an integer number (738450).

2^2806091 is an apocalyptic number.

2806091 is a deficient number, since it is larger than the sum of its proper divisors (147709).

2806091 is a wasteful number, since it uses less digits than its factorization.

2806091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147708.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2806091 is about 1675.1390987020. The cubic root of 2806091 is about 141.0481032326.

Subtracting from 2806091 its reverse (1906082), we obtain a palindrome (900009).

The spelling of 2806091 in words is "two million, eight hundred six thousand, ninety-one".